Caring for car tires properly: Ten golden rules for a safe journey. Tests have shown that a tire pressure that is 20 percent too low leads to up to 30 percent more tire wear.
A minimal contact area, barely larger than two postcards per tire, determines driving behavior and braking distance. If the tire pressure is just half a bar too low, the driving characteristics, braking distance and cornering position change. In addition to the tread depth of a tire, the correct air pressure should also be checked regularly.